Proto J1730 Obstruction Box End Wrench 9/16 X 5/8 in 12 Pt

Product Description

The PROTO J1730 is a double-end obstruction box end wrench designed for fastener access in tight or recessed spaces where a standard box wrench cannot reach. Both ends feature 12-point profiles, giving the technician the ability to engage hex fasteners at 30-degree increments for repositioning in confined areas. Constructed from steel, this wrench fits 9/16-inch and 5/8-inch fasteners. It is a non-ratcheting tool intended for hand-torque applications. Electricians, HVAC technicians, and plumbers use obstruction wrenches when fastener clearance is limited by surrounding structure, enclosures, or adjacent components.

This wrench is suited for service work on equipment with deeply recessed or partially obstructed fasteners, such as panel interiors, mechanical equipment rooms, and tight mechanical assemblies. The double-end configuration provides two commonly paired fastener sizes in one tool, reducing the need to swap wrenches during a job. It is appropriate for residential and light commercial trade applications where 9/16-inch and 5/8-inch hex fasteners are standard.

Key Features

• Double-end design with 9/16-inch and 5/8-inch openings for two fastener sizes in one tool
• 12-point box end profile allows 30-degree arc swing for repositioning in restricted spaces
• Obstruction-style offset head clears surrounding structure near recessed fasteners
• Steel construction for durability under hand-torque loads
• Non-ratcheting design for straightforward fastener engagement

Compatibility

Designed as a standard obstruction box end wrench for 9/16-inch and 5/8-inch hex fasteners in trade and mechanical service applications.

Installation Notes

This wrench is a hand tool used by licensed HVAC technicians, electricians, plumbers, and general trade professionals. Always de-energize and lock out electrical equipment before using any hand tool inside enclosures or panels. Confirm fastener size before applying torque to avoid rounding. Do not extend the handle with a pipe or cheater bar, as this is a hand-torque tool without a rated extension provision.